I do a couple of sets of dumbell flys with light weight and then some front & side raises with 5lb and then 10lb small plates to warm up my shoulders before bench.Then start out with 135lb then go up from there!

For a change of pace try some pre-exhaustion on auxiliary bodyparts in beching. For bench press you can exhaust your triceps and deltoids 1st ..work them to near failure. Now when you bench press you'll use more chest with little assistance from your tris and delts. It's just one technique I use occasionally. You won't set any records and use less weight but it focuses the intensity on your chest. Always do some rotator work before benching...it can save your delts..especially if you are going heavy. I only use benching as an overall building exercise and power movement along with squats and deadlifts with my 1rep max bench at 515lbs....but for direct chest exercises there are much better movements...dips with arms out neck down leaning forward...and flyes with thumbless grip and elbows bend...just as 2 examples.